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https://github.com/macdiesel/edx-split-utils

How To Find the Size of All Active Structures

Issue this command at the MongoDB command line of the replica DB:

Code Block
languagejs
themeFadeToGrey
db.modulestore.active_versions.find().forEach(
    function(obj) {
        var published_id = obj["versions"]["published-branch"];
        struct_obj = db.modulestore.structures.findOne(published_id);
        var curr = Object.bsonsize(struct_obj);
        print(curr + " :: " + obj["org"] + "/" + obj["course"] + "/" + obj["run"]);
    }
)

How To Walk Structure History Backwards From the Current Active Version 

Code Block
languagejs
rs.slaveOk();
var course_id = { "org": "HarvardX", "course": "SPU27x", "run": "2015_Q2"};
course_idx = db.modulestore.active_versions.findOne(course_id);
print("Course Index:")
printjson(course_idx);

var pub_struct_id = course_idx["versions"]["draft-branch"];

/* Walk the draft structure version tree backwards. */
var curr_struct = db.modulestore.structures.findOne( { "_id": pub_struct_id }, {_id: 1, edited_on: 1, previous_version: 1} );
print("Current draft structure: " + curr_struct._id);
print("Edited on: " + curr_struct.edited_on);

var generation = 1;
while ( curr_struct != null ) {
    curr_struct = db.modulestore.structures.findOne( { "_id": curr_struct.previous_version }, {_id: 1, edited_on: 1, previous_version: 1} );
    print("Previous: " + curr_struct._id + " - Edited on: " + curr_struct.edited_on + " - generation: " + generation);
    generation++;
}